Massachusetts General Laws Part II. Real and Personal Property and Domestic Relations (Ch. 183-210) Ch. 206, § 10

Upon the redemption of such mortgage the money paid thereon shall be received by the executor or administrator, and he shall thereupon release and discharge the mortgage; and until such redemption the executor or administrator, if possession has been taken either by himself or by the deceased, shall be seized of the mortgaged property in trust for the persons who would be entitled to the money if the property had been redeemed.